Tube-extractor for wells.



PATENTBD DEC. 3, 1907.

J. A. HOLMBERG.

TUBE EXTRAGTOR FOR WELLS.

APPLICATION FILED JUNE 13,1907.

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JOHN A. HOLMBERG, OF LINDSBORG, KANSAS.

TUBE-EXTRACTOR FOR WELLS.

Specification of Letters Patent.

Patented Dec. 3, 1907.

Application filed June 13. 1907. Serial No. 378.770.

T 0 all whom it may concern:

Be it known that I, JOHN A. HOLMBERG, a citizen of the United States,residing at Lindsborg, in the county of McPherson and State of Kansas,have invented certain new and useful Improvements in Tube-Extractors forWells and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to improvements in tube extractors for drilledwells.

The object of the invention is to provide a device of this character bymeans of which the broken off sections of well tube may be quickly andeasily extracted from wells.

I/Vith this object in view, the invention consists of certain novelfeatures of construction, combination and arrangement of parts as willbe more fully described and particularly pointed out in the appendedclaims.

In the accompanying drawings, Figure 1 is a side view of the device,parts of the same being shown in section; and Fig. 2 is a similar viewof the device showing the manner in which the same is engaged with abroken well tube to extract the same.

Referring more particularly to the drawings, 1 denotes the extractingtool, which comprises a rod 2, having secured to its upper end acoupling or section'of pipe, 3,

threaded at its outer end and adapted to be.

screwed into the lower end of an operating tube or rod (not shown). Thelower end of the rod 2 is preferably tapered to a point, as shown at 4.

Formed in one side of the rod 2, adjacent to its lower end is awedge-shaped recess 5, the wider portion of which is disposed at itsupper end, as shown. Loosely mounted in the recess 5 is a wedge-shapedextracting block 6, which is normally held in position in the recess 5by means of a sleeve 7, as clearly shown in Fig. 1 of the drawing.

In operation the rod 2 is let down into the well so that the lower endof the same projects into the broken section of the tube. IVhen thelower end of the rod 2 enters the broken tube the upper end of thelatter will engage the lower edge of the sleeve 7, and force the sameupwardly on the rod 2 above the upper end of the wedge, which willpermit the latter to slip downwardly in the recess 5 so that when therod 2 is drawn upwardly, saidblock will be wedged or forced tightlybetween the inner wall of the recess 5, and the inner wall of the brokensection of the tube, and will cause saidbroken section to be firmlygripped by the rod, and thus withdrawn from the well.

It will be seen from the foregoing that the heavier the section of tube,and the stronger the pull exerted upon the rod 2, the tighter will bethe grip between the wedge and lower end of the rod with the tube.

Having described my invention, what I claim as new and desire to secureby Letters- Patent, is:

1. A well extractor having a gravity-actuated gripping device and aslidable. sleeve adapted to initially retain the latter retracted and,finally, to be engaged by the broken well tube for the release of saidgripping device for its projection and-effective engagement with saidbroken well tube.

2. An extractor for well tubes comprising a rod having formed thereinadjacent to its lower end a wedge-shaped recess, a wedgeshaped grippingblock arranged in said recess, a sleeve slidably mounted on said rod tohold said wedgeblock in position, said sleeve being adapted to beengaged by the upper end of the broken Well tube to release saidgripping block and thus permit the same to assume an operative positionin engagement with the well tube, substantially as described.

3. An extractor for well tubes comprising a rod having a tapered lowerend and a wedge-shaped recess formed therein adjacent to its lower end,a wedge-shaped gripping block arranged in said recess, a sleeve slidablymounted on said rod to normally hold said block in an inoperativeposition, and a coupling tube arranged on the upper end of said rod,substantially as described.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

JOHN A. HOLMBERG.

